Analytic results for the above form factors
are computed class by class of Feynman diagrams
as follows. First, one-loop amplitudes
for all Feynman diagrams mentioned in above
are written down.
We then handle with Dirac traces and Lorentz
contractions in \(d\)  dimensions by using
Package-X [1]}. The amplitudes
are next decomposed into tensor one-loop integrals.
By following tensor reduction for
one-loop integrals in [2]},
the tensor integrals are then expressed in terms of
the PV-functions which they can be evaluated numerically
by using LoopTools [3]}. In detail,
analytical results for all form factors
are shown in the following paragraphs.
